<!DOCTYPE html>
<html>

<head>
    <meta charset="utf-8">
    <title>本地flex测试</title>
    <style>
        .box {
            color: white;
            background-color: #f99;
            font-size: 14px;
        }

        .box {
            height: 300px;
            width: 300px;
            display: flex;

            justify-content: space-between;
            flex-wrap: wrap;
            align-content: space-between;
        }

        .row{
            width: 100%;
            display: flex;
            justify-content: space-between;
        }

        .item {
            width: 50px;
            height: 50px;
            background-color: wheat;


            text-align: center;
            font-size: 20px;



            border-radius: 50%;

        }

        .box .item:nth-child(2){
            /* align-self: center; */
        }

        .box .item:nth-child(3){
            /* align-self: flex-end; */
        }


    </style>
</head>

<body>

    <div class="box">
        <div class="item"></div>
    </div>


</body>

</html>